mirror of https://git.ffmpeg.org/ffmpeg.git
1091 lines
36 KiB
C
1091 lines
36 KiB
C
/*
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* H.26L/H.264/AVC/JVT/14496-10/... decoder
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* H.264 / AVC / MPEG-4 part10 codec.
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#define UNCHECKED_BITSTREAM_READER 1
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#include "libavutil/avassert.h"
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#include "libavutil/display.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#include "libavutil/stereo3d.h"
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#include "libavutil/timer.h"
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#include "internal.h"
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#include "bytestream.h"
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#include "cabac.h"
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#include "cabac_functions.h"
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#include "error_resilience.h"
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#include "avcodec.h"
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#include "h264.h"
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#include "h264dec.h"
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#include "h2645_parse.h"
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#include "h264data.h"
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#include "h264chroma.h"
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#include "h264_mvpred.h"
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#include "h264_ps.h"
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#include "golomb.h"
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#include "hwaccel.h"
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#include "mathops.h"
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#include "me_cmp.h"
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#include "mpegutils.h"
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#include "profiles.h"
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#include "rectangle.h"
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#include "thread.h"
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const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
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int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
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{
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H264Context *h = avctx->priv_data;
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return h && h->ps.sps ? h->ps.sps->num_reorder_frames : 0;
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}
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static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
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int (*mv)[2][4][2],
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int mb_x, int mb_y, int mb_intra, int mb_skipped)
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{
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H264Context *h = opaque;
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H264SliceContext *sl = &h->slice_ctx[0];
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sl->mb_x = mb_x;
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sl->mb_y = mb_y;
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sl->mb_xy = mb_x + mb_y * h->mb_stride;
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memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
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av_assert1(ref >= 0);
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/* FIXME: It is possible albeit uncommon that slice references
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* differ between slices. We take the easy approach and ignore
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* it for now. If this turns out to have any relevance in
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* practice then correct remapping should be added. */
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if (ref >= sl->ref_count[0])
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ref = 0;
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if (!sl->ref_list[0][ref].data[0]) {
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av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
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ref = 0;
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}
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if ((sl->ref_list[0][ref].reference&3) != 3) {
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av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
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return;
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}
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fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
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2, 2, 2, ref, 1);
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fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
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fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
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pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
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sl->mb_mbaff =
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sl->mb_field_decoding_flag = 0;
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ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
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}
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void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl,
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int y, int height)
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{
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AVCodecContext *avctx = h->avctx;
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const AVFrame *src = h->cur_pic.f;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
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int vshift = desc->log2_chroma_h;
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const int field_pic = h->picture_structure != PICT_FRAME;
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if (field_pic) {
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height <<= 1;
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y <<= 1;
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}
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height = FFMIN(height, avctx->height - y);
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if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
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return;
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if (avctx->draw_horiz_band) {
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int offset[AV_NUM_DATA_POINTERS];
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int i;
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offset[0] = y * src->linesize[0];
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offset[1] =
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offset[2] = (y >> vshift) * src->linesize[1];
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for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
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offset[i] = 0;
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emms_c();
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avctx->draw_horiz_band(avctx, src, offset,
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y, h->picture_structure, height);
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}
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}
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void ff_h264_free_tables(H264Context *h)
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{
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int i;
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av_freep(&h->intra4x4_pred_mode);
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av_freep(&h->chroma_pred_mode_table);
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av_freep(&h->cbp_table);
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av_freep(&h->mvd_table[0]);
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av_freep(&h->mvd_table[1]);
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av_freep(&h->direct_table);
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av_freep(&h->non_zero_count);
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av_freep(&h->slice_table_base);
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h->slice_table = NULL;
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av_freep(&h->list_counts);
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av_freep(&h->mb2b_xy);
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av_freep(&h->mb2br_xy);
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av_buffer_pool_uninit(&h->qscale_table_pool);
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av_buffer_pool_uninit(&h->mb_type_pool);
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av_buffer_pool_uninit(&h->motion_val_pool);
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av_buffer_pool_uninit(&h->ref_index_pool);
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for (i = 0; i < h->nb_slice_ctx; i++) {
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H264SliceContext *sl = &h->slice_ctx[i];
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av_freep(&sl->dc_val_base);
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av_freep(&sl->er.mb_index2xy);
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av_freep(&sl->er.error_status_table);
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av_freep(&sl->er.er_temp_buffer);
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av_freep(&sl->bipred_scratchpad);
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av_freep(&sl->edge_emu_buffer);
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av_freep(&sl->top_borders[0]);
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av_freep(&sl->top_borders[1]);
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sl->bipred_scratchpad_allocated = 0;
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sl->edge_emu_buffer_allocated = 0;
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sl->top_borders_allocated[0] = 0;
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sl->top_borders_allocated[1] = 0;
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}
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}
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int ff_h264_alloc_tables(H264Context *h)
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{
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const int big_mb_num = h->mb_stride * (h->mb_height + 1);
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const int row_mb_num = 2*h->mb_stride*FFMAX(h->nb_slice_ctx, 1);
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int x, y;
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FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
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row_mb_num, 8 * sizeof(uint8_t), fail)
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h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
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FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
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big_mb_num * 48 * sizeof(uint8_t), fail)
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FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
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(big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
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FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
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big_mb_num * sizeof(uint16_t), fail)
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FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
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big_mb_num * sizeof(uint8_t), fail)
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FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[0],
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row_mb_num, 16 * sizeof(uint8_t), fail);
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FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[1],
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row_mb_num, 16 * sizeof(uint8_t), fail);
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h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
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h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
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FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
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4 * big_mb_num * sizeof(uint8_t), fail);
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FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
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big_mb_num * sizeof(uint8_t), fail)
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memset(h->slice_table_base, -1,
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(big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
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h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
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FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
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big_mb_num * sizeof(uint32_t), fail);
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FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
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big_mb_num * sizeof(uint32_t), fail);
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for (y = 0; y < h->mb_height; y++)
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for (x = 0; x < h->mb_width; x++) {
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const int mb_xy = x + y * h->mb_stride;
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const int b_xy = 4 * x + 4 * y * h->b_stride;
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h->mb2b_xy[mb_xy] = b_xy;
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h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
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}
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return 0;
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fail:
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ff_h264_free_tables(h);
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return AVERROR(ENOMEM);
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}
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/**
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* Init context
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* Allocate buffers which are not shared amongst multiple threads.
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*/
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int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
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{
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ERContext *er = &sl->er;
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int mb_array_size = h->mb_height * h->mb_stride;
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int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
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int c_size = h->mb_stride * (h->mb_height + 1);
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int yc_size = y_size + 2 * c_size;
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int x, y, i;
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sl->ref_cache[0][scan8[5] + 1] =
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sl->ref_cache[0][scan8[7] + 1] =
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sl->ref_cache[0][scan8[13] + 1] =
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sl->ref_cache[1][scan8[5] + 1] =
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sl->ref_cache[1][scan8[7] + 1] =
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sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
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if (sl != h->slice_ctx) {
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memset(er, 0, sizeof(*er));
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} else
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if (CONFIG_ERROR_RESILIENCE) {
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/* init ER */
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er->avctx = h->avctx;
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er->decode_mb = h264_er_decode_mb;
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er->opaque = h;
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er->quarter_sample = 1;
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er->mb_num = h->mb_num;
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er->mb_width = h->mb_width;
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er->mb_height = h->mb_height;
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er->mb_stride = h->mb_stride;
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er->b8_stride = h->mb_width * 2 + 1;
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// error resilience code looks cleaner with this
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FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy,
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(h->mb_num + 1) * sizeof(int), fail);
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for (y = 0; y < h->mb_height; y++)
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for (x = 0; x < h->mb_width; x++)
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er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
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er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
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h->mb_stride + h->mb_width;
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FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
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mb_array_size * sizeof(uint8_t), fail);
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FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer,
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h->mb_height * h->mb_stride * (4*sizeof(int) + 1), fail);
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FF_ALLOCZ_OR_GOTO(h->avctx, sl->dc_val_base,
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yc_size * sizeof(int16_t), fail);
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er->dc_val[0] = sl->dc_val_base + h->mb_width * 2 + 2;
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er->dc_val[1] = sl->dc_val_base + y_size + h->mb_stride + 1;
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er->dc_val[2] = er->dc_val[1] + c_size;
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for (i = 0; i < yc_size; i++)
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sl->dc_val_base[i] = 1024;
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}
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return 0;
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fail:
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return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
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}
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static int h264_init_context(AVCodecContext *avctx, H264Context *h)
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{
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int i;
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h->avctx = avctx;
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h->cur_chroma_format_idc = -1;
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h->width_from_caller = avctx->width;
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h->height_from_caller = avctx->height;
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h->picture_structure = PICT_FRAME;
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h->workaround_bugs = avctx->workaround_bugs;
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h->flags = avctx->flags;
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h->poc.prev_poc_msb = 1 << 16;
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h->recovery_frame = -1;
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h->frame_recovered = 0;
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h->poc.prev_frame_num = -1;
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h->sei.frame_packing.arrangement_cancel_flag = -1;
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h->sei.unregistered.x264_build = -1;
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h->next_outputed_poc = INT_MIN;
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for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
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h->last_pocs[i] = INT_MIN;
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ff_h264_sei_uninit(&h->sei);
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avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
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h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? avctx->thread_count : 1;
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h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
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if (!h->slice_ctx) {
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h->nb_slice_ctx = 0;
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return AVERROR(ENOMEM);
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}
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for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
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h->DPB[i].f = av_frame_alloc();
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if (!h->DPB[i].f)
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return AVERROR(ENOMEM);
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}
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h->cur_pic.f = av_frame_alloc();
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if (!h->cur_pic.f)
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return AVERROR(ENOMEM);
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h->last_pic_for_ec.f = av_frame_alloc();
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if (!h->last_pic_for_ec.f)
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return AVERROR(ENOMEM);
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for (i = 0; i < h->nb_slice_ctx; i++)
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h->slice_ctx[i].h264 = h;
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return 0;
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}
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static av_cold int h264_decode_end(AVCodecContext *avctx)
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{
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H264Context *h = avctx->priv_data;
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int i;
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ff_h264_remove_all_refs(h);
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ff_h264_free_tables(h);
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for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
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ff_h264_unref_picture(h, &h->DPB[i]);
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av_frame_free(&h->DPB[i].f);
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}
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memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
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h->cur_pic_ptr = NULL;
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av_freep(&h->slice_ctx);
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h->nb_slice_ctx = 0;
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ff_h264_sei_uninit(&h->sei);
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ff_h264_ps_uninit(&h->ps);
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ff_h2645_packet_uninit(&h->pkt);
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ff_h264_unref_picture(h, &h->cur_pic);
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av_frame_free(&h->cur_pic.f);
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ff_h264_unref_picture(h, &h->last_pic_for_ec);
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av_frame_free(&h->last_pic_for_ec.f);
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return 0;
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}
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static AVOnce h264_vlc_init = AV_ONCE_INIT;
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static av_cold int h264_decode_init(AVCodecContext *avctx)
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{
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H264Context *h = avctx->priv_data;
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int ret;
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ret = h264_init_context(avctx, h);
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if (ret < 0)
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return ret;
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ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
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if (ret != 0) {
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av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
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return AVERROR_UNKNOWN;
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}
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if (avctx->ticks_per_frame == 1) {
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if(h->avctx->time_base.den < INT_MAX/2) {
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h->avctx->time_base.den *= 2;
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} else
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h->avctx->time_base.num /= 2;
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}
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avctx->ticks_per_frame = 2;
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if (avctx->extradata_size > 0 && avctx->extradata) {
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ret = ff_h264_decode_extradata(avctx->extradata, avctx->extradata_size,
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&h->ps, &h->is_avc, &h->nal_length_size,
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avctx->err_recognition, avctx);
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if (ret < 0) {
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h264_decode_end(avctx);
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return ret;
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}
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}
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if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
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h->avctx->has_b_frames < h->ps.sps->num_reorder_frames) {
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h->avctx->has_b_frames = h->ps.sps->num_reorder_frames;
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}
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avctx->internal->allocate_progress = 1;
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ff_h264_flush_change(h);
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if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
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h->enable_er = 0;
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if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
|
|
"Use it at your own risk\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if HAVE_THREADS
|
|
static int decode_init_thread_copy(AVCodecContext *avctx)
|
|
{
|
|
H264Context *h = avctx->priv_data;
|
|
int ret;
|
|
|
|
if (!avctx->internal->is_copy)
|
|
return 0;
|
|
|
|
memset(h, 0, sizeof(*h));
|
|
|
|
ret = h264_init_context(avctx, h);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
h->context_initialized = 0;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* instantaneous decoder refresh.
|
|
*/
|
|
static void idr(H264Context *h)
|
|
{
|
|
int i;
|
|
ff_h264_remove_all_refs(h);
|
|
h->poc.prev_frame_num =
|
|
h->poc.prev_frame_num_offset = 0;
|
|
h->poc.prev_poc_msb = 1<<16;
|
|
h->poc.prev_poc_lsb = 0;
|
|
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
|
|
h->last_pocs[i] = INT_MIN;
|
|
}
|
|
|
|
/* forget old pics after a seek */
|
|
void ff_h264_flush_change(H264Context *h)
|
|
{
|
|
int i, j;
|
|
|
|
h->next_outputed_poc = INT_MIN;
|
|
h->prev_interlaced_frame = 1;
|
|
idr(h);
|
|
|
|
h->poc.prev_frame_num = -1;
|
|
if (h->cur_pic_ptr) {
|
|
h->cur_pic_ptr->reference = 0;
|
|
for (j=i=0; h->delayed_pic[i]; i++)
|
|
if (h->delayed_pic[i] != h->cur_pic_ptr)
|
|
h->delayed_pic[j++] = h->delayed_pic[i];
|
|
h->delayed_pic[j] = NULL;
|
|
}
|
|
ff_h264_unref_picture(h, &h->last_pic_for_ec);
|
|
|
|
h->first_field = 0;
|
|
h->recovery_frame = -1;
|
|
h->frame_recovered = 0;
|
|
h->current_slice = 0;
|
|
h->mmco_reset = 1;
|
|
}
|
|
|
|
/* forget old pics after a seek */
|
|
static void flush_dpb(AVCodecContext *avctx)
|
|
{
|
|
H264Context *h = avctx->priv_data;
|
|
int i;
|
|
|
|
memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
|
|
|
|
ff_h264_flush_change(h);
|
|
ff_h264_sei_uninit(&h->sei);
|
|
|
|
for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
|
|
ff_h264_unref_picture(h, &h->DPB[i]);
|
|
h->cur_pic_ptr = NULL;
|
|
ff_h264_unref_picture(h, &h->cur_pic);
|
|
|
|
h->mb_y = 0;
|
|
|
|
ff_h264_free_tables(h);
|
|
h->context_initialized = 0;
|
|
}
|
|
|
|
static int get_last_needed_nal(H264Context *h)
|
|
{
|
|
int nals_needed = 0;
|
|
int first_slice = 0;
|
|
int i, ret;
|
|
|
|
for (i = 0; i < h->pkt.nb_nals; i++) {
|
|
H2645NAL *nal = &h->pkt.nals[i];
|
|
GetBitContext gb;
|
|
|
|
/* packets can sometimes contain multiple PPS/SPS,
|
|
* e.g. two PAFF field pictures in one packet, or a demuxer
|
|
* which splits NALs strangely if so, when frame threading we
|
|
* can't start the next thread until we've read all of them */
|
|
switch (nal->type) {
|
|
case H264_NAL_SPS:
|
|
case H264_NAL_PPS:
|
|
nals_needed = i;
|
|
break;
|
|
case H264_NAL_DPA:
|
|
case H264_NAL_IDR_SLICE:
|
|
case H264_NAL_SLICE:
|
|
ret = init_get_bits8(&gb, nal->data + 1, nal->size - 1);
|
|
if (ret < 0) {
|
|
av_log(h->avctx, AV_LOG_ERROR, "Invalid zero-sized VCL NAL unit\n");
|
|
if (h->avctx->err_recognition & AV_EF_EXPLODE)
|
|
return ret;
|
|
|
|
break;
|
|
}
|
|
if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
|
|
!first_slice ||
|
|
first_slice != nal->type)
|
|
nals_needed = i;
|
|
if (!first_slice)
|
|
first_slice = nal->type;
|
|
}
|
|
}
|
|
|
|
return nals_needed;
|
|
}
|
|
|
|
static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
|
|
{
|
|
av_log(logctx, AV_LOG_DEBUG, "Green Metadata Info SEI message\n");
|
|
av_log(logctx, AV_LOG_DEBUG, " green_metadata_type: %d\n", gm->green_metadata_type);
|
|
|
|
if (gm->green_metadata_type == 0) {
|
|
av_log(logctx, AV_LOG_DEBUG, " green_metadata_period_type: %d\n", gm->period_type);
|
|
|
|
if (gm->period_type == 2)
|
|
av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_seconds: %d\n", gm->num_seconds);
|
|
else if (gm->period_type == 3)
|
|
av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_pictures: %d\n", gm->num_pictures);
|
|
|
|
av_log(logctx, AV_LOG_DEBUG, " SEI GREEN Complexity Metrics: %f %f %f %f\n",
|
|
(float)gm->percent_non_zero_macroblocks/255,
|
|
(float)gm->percent_intra_coded_macroblocks/255,
|
|
(float)gm->percent_six_tap_filtering/255,
|
|
(float)gm->percent_alpha_point_deblocking_instance/255);
|
|
|
|
} else if (gm->green_metadata_type == 1) {
|
|
av_log(logctx, AV_LOG_DEBUG, " xsd_metric_type: %d\n", gm->xsd_metric_type);
|
|
|
|
if (gm->xsd_metric_type == 0)
|
|
av_log(logctx, AV_LOG_DEBUG, " xsd_metric_value: %f\n",
|
|
(float)gm->xsd_metric_value/100);
|
|
}
|
|
}
|
|
|
|
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
|
|
{
|
|
AVCodecContext *const avctx = h->avctx;
|
|
int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
|
|
int idr_cleared=0;
|
|
int i, ret = 0;
|
|
|
|
h->has_slice = 0;
|
|
h->nal_unit_type= 0;
|
|
|
|
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
|
|
h->current_slice = 0;
|
|
if (!h->first_field) {
|
|
h->cur_pic_ptr = NULL;
|
|
ff_h264_sei_uninit(&h->sei);
|
|
}
|
|
}
|
|
|
|
if (h->nal_length_size == 4) {
|
|
if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
|
|
h->is_avc = 0;
|
|
}else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
|
|
h->is_avc = 1;
|
|
}
|
|
|
|
ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc,
|
|
h->nal_length_size, avctx->codec_id, avctx->flags2 & AV_CODEC_FLAG2_FAST);
|
|
if (ret < 0) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Error splitting the input into NAL units.\n");
|
|
return ret;
|
|
}
|
|
|
|
if (avctx->active_thread_type & FF_THREAD_FRAME)
|
|
nals_needed = get_last_needed_nal(h);
|
|
if (nals_needed < 0)
|
|
return nals_needed;
|
|
|
|
for (i = 0; i < h->pkt.nb_nals; i++) {
|
|
H2645NAL *nal = &h->pkt.nals[i];
|
|
int max_slice_ctx, err;
|
|
|
|
if (avctx->skip_frame >= AVDISCARD_NONREF &&
|
|
nal->ref_idc == 0 && nal->type != H264_NAL_SEI)
|
|
continue;
|
|
|
|
// FIXME these should stop being context-global variables
|
|
h->nal_ref_idc = nal->ref_idc;
|
|
h->nal_unit_type = nal->type;
|
|
|
|
err = 0;
|
|
switch (nal->type) {
|
|
case H264_NAL_IDR_SLICE:
|
|
if ((nal->data[1] & 0xFC) == 0x98) {
|
|
av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
|
|
h->next_outputed_poc = INT_MIN;
|
|
ret = -1;
|
|
goto end;
|
|
}
|
|
if(!idr_cleared) {
|
|
if (h->current_slice && (avctx->active_thread_type & FF_THREAD_SLICE)) {
|
|
av_log(h, AV_LOG_ERROR, "invalid mixed IDR / non IDR frames cannot be decoded in slice multithreading mode\n");
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto end;
|
|
}
|
|
idr(h); // FIXME ensure we don't lose some frames if there is reordering
|
|
}
|
|
idr_cleared = 1;
|
|
h->has_recovery_point = 1;
|
|
case H264_NAL_SLICE:
|
|
h->has_slice = 1;
|
|
|
|
if ((err = ff_h264_queue_decode_slice(h, nal))) {
|
|
H264SliceContext *sl = h->slice_ctx + h->nb_slice_ctx_queued;
|
|
sl->ref_count[0] = sl->ref_count[1] = 0;
|
|
break;
|
|
}
|
|
|
|
if (h->current_slice == 1) {
|
|
if (avctx->active_thread_type & FF_THREAD_FRAME &&
|
|
i >= nals_needed && !h->setup_finished && h->cur_pic_ptr) {
|
|
ff_thread_finish_setup(avctx);
|
|
h->setup_finished = 1;
|
|
}
|
|
|
|
if (h->avctx->hwaccel &&
|
|
(ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
|
|
goto end;
|
|
}
|
|
|
|
max_slice_ctx = avctx->hwaccel ? 1 : h->nb_slice_ctx;
|
|
if (h->nb_slice_ctx_queued == max_slice_ctx) {
|
|
if (h->avctx->hwaccel) {
|
|
ret = avctx->hwaccel->decode_slice(avctx, nal->raw_data, nal->raw_size);
|
|
h->nb_slice_ctx_queued = 0;
|
|
} else
|
|
ret = ff_h264_execute_decode_slices(h);
|
|
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto end;
|
|
}
|
|
break;
|
|
case H264_NAL_DPA:
|
|
case H264_NAL_DPB:
|
|
case H264_NAL_DPC:
|
|
avpriv_request_sample(avctx, "data partitioning");
|
|
break;
|
|
case H264_NAL_SEI:
|
|
ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
|
|
h->has_recovery_point = h->has_recovery_point || h->sei.recovery_point.recovery_frame_cnt != -1;
|
|
if (avctx->debug & FF_DEBUG_GREEN_MD)
|
|
debug_green_metadata(&h->sei.green_metadata, h->avctx);
|
|
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto end;
|
|
break;
|
|
case H264_NAL_SPS: {
|
|
GetBitContext tmp_gb = nal->gb;
|
|
if (avctx->hwaccel && avctx->hwaccel->decode_params) {
|
|
ret = avctx->hwaccel->decode_params(avctx,
|
|
nal->type,
|
|
nal->raw_data,
|
|
nal->raw_size);
|
|
if (ret < 0)
|
|
goto end;
|
|
}
|
|
if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
|
|
break;
|
|
av_log(h->avctx, AV_LOG_DEBUG,
|
|
"SPS decoding failure, trying again with the complete NAL\n");
|
|
init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
|
|
if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
|
|
break;
|
|
ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
|
|
break;
|
|
}
|
|
case H264_NAL_PPS:
|
|
if (avctx->hwaccel && avctx->hwaccel->decode_params) {
|
|
ret = avctx->hwaccel->decode_params(avctx,
|
|
nal->type,
|
|
nal->raw_data,
|
|
nal->raw_size);
|
|
if (ret < 0)
|
|
goto end;
|
|
}
|
|
ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
|
|
nal->size_bits);
|
|
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto end;
|
|
break;
|
|
case H264_NAL_AUD:
|
|
case H264_NAL_END_SEQUENCE:
|
|
case H264_NAL_END_STREAM:
|
|
case H264_NAL_FILLER_DATA:
|
|
case H264_NAL_SPS_EXT:
|
|
case H264_NAL_AUXILIARY_SLICE:
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
|
|
nal->type, nal->size_bits);
|
|
}
|
|
|
|
if (err < 0) {
|
|
av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
|
|
}
|
|
}
|
|
|
|
ret = ff_h264_execute_decode_slices(h);
|
|
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto end;
|
|
|
|
ret = 0;
|
|
end:
|
|
|
|
#if CONFIG_ERROR_RESILIENCE
|
|
/*
|
|
* FIXME: Error handling code does not seem to support interlaced
|
|
* when slices span multiple rows
|
|
* The ff_er_add_slice calls don't work right for bottom
|
|
* fields; they cause massive erroneous error concealing
|
|
* Error marking covers both fields (top and bottom).
|
|
* This causes a mismatched s->error_count
|
|
* and a bad error table. Further, the error count goes to
|
|
* INT_MAX when called for bottom field, because mb_y is
|
|
* past end by one (callers fault) and resync_mb_y != 0
|
|
* causes problems for the first MB line, too.
|
|
*/
|
|
if (!FIELD_PICTURE(h) && h->current_slice &&
|
|
h->ps.sps == (const SPS*)h->ps.sps_list[h->ps.pps->sps_id]->data &&
|
|
h->enable_er) {
|
|
|
|
H264SliceContext *sl = h->slice_ctx;
|
|
int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
|
|
|
|
ff_h264_set_erpic(&sl->er.cur_pic, h->cur_pic_ptr);
|
|
|
|
if (use_last_pic) {
|
|
ff_h264_set_erpic(&sl->er.last_pic, &h->last_pic_for_ec);
|
|
sl->ref_list[0][0].parent = &h->last_pic_for_ec;
|
|
memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
|
|
memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
|
|
sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
|
|
} else if (sl->ref_count[0]) {
|
|
ff_h264_set_erpic(&sl->er.last_pic, sl->ref_list[0][0].parent);
|
|
} else
|
|
ff_h264_set_erpic(&sl->er.last_pic, NULL);
|
|
|
|
if (sl->ref_count[1])
|
|
ff_h264_set_erpic(&sl->er.next_pic, sl->ref_list[1][0].parent);
|
|
|
|
sl->er.ref_count = sl->ref_count[0];
|
|
|
|
ff_er_frame_end(&sl->er);
|
|
if (use_last_pic)
|
|
memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
|
|
}
|
|
#endif /* CONFIG_ERROR_RESILIENCE */
|
|
/* clean up */
|
|
if (h->cur_pic_ptr && !h->droppable && h->has_slice) {
|
|
ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
|
|
h->picture_structure == PICT_BOTTOM_FIELD);
|
|
}
|
|
|
|
return (ret < 0) ? ret : buf_size;
|
|
}
|
|
|
|
/**
|
|
* Return the number of bytes consumed for building the current frame.
|
|
*/
|
|
static int get_consumed_bytes(int pos, int buf_size)
|
|
{
|
|
if (pos == 0)
|
|
pos = 1; // avoid infinite loops (I doubt that is needed but...)
|
|
if (pos + 10 > buf_size)
|
|
pos = buf_size; // oops ;)
|
|
|
|
return pos;
|
|
}
|
|
|
|
static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
|
|
{
|
|
AVFrame *src = srcp->f;
|
|
int ret;
|
|
|
|
ret = av_frame_ref(dst, src);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.frame_packing), 0);
|
|
|
|
if (srcp->sei_recovery_frame_cnt == 0)
|
|
dst->key_frame = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int is_extra(const uint8_t *buf, int buf_size)
|
|
{
|
|
int cnt= buf[5]&0x1f;
|
|
const uint8_t *p= buf+6;
|
|
while(cnt--){
|
|
int nalsize= AV_RB16(p) + 2;
|
|
if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
|
|
return 0;
|
|
p += nalsize;
|
|
}
|
|
cnt = *(p++);
|
|
if(!cnt)
|
|
return 0;
|
|
while(cnt--){
|
|
int nalsize= AV_RB16(p) + 2;
|
|
if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
|
|
return 0;
|
|
p += nalsize;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
|
|
{
|
|
int ret;
|
|
|
|
if (((h->avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) ||
|
|
(h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL) ||
|
|
out->recovered)) {
|
|
|
|
if (!h->avctx->hwaccel &&
|
|
(out->field_poc[0] == INT_MAX ||
|
|
out->field_poc[1] == INT_MAX)
|
|
) {
|
|
int p;
|
|
AVFrame *f = out->f;
|
|
int field = out->field_poc[0] == INT_MAX;
|
|
uint8_t *dst_data[4];
|
|
int linesizes[4];
|
|
const uint8_t *src_data[4];
|
|
|
|
av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
|
|
|
|
for (p = 0; p<4; p++) {
|
|
dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
|
|
src_data[p] = f->data[p] + field *f->linesize[p];
|
|
linesizes[p] = 2*f->linesize[p];
|
|
}
|
|
|
|
av_image_copy(dst_data, linesizes, src_data, linesizes,
|
|
f->format, f->width, f->height>>1);
|
|
}
|
|
|
|
ret = output_frame(h, dst, out);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*got_frame = 1;
|
|
|
|
if (CONFIG_MPEGVIDEO) {
|
|
ff_print_debug_info2(h->avctx, dst, NULL,
|
|
out->mb_type,
|
|
out->qscale_table,
|
|
out->motion_val,
|
|
NULL,
|
|
h->mb_width, h->mb_height, h->mb_stride, 1);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame,
|
|
int *got_frame, int buf_index)
|
|
{
|
|
int ret, i, out_idx;
|
|
H264Picture *out = h->delayed_pic[0];
|
|
|
|
h->cur_pic_ptr = NULL;
|
|
h->first_field = 0;
|
|
|
|
out_idx = 0;
|
|
for (i = 1;
|
|
h->delayed_pic[i] &&
|
|
!h->delayed_pic[i]->f->key_frame &&
|
|
!h->delayed_pic[i]->mmco_reset;
|
|
i++)
|
|
if (h->delayed_pic[i]->poc < out->poc) {
|
|
out = h->delayed_pic[i];
|
|
out_idx = i;
|
|
}
|
|
|
|
for (i = out_idx; h->delayed_pic[i]; i++)
|
|
h->delayed_pic[i] = h->delayed_pic[i + 1];
|
|
|
|
if (out) {
|
|
out->reference &= ~DELAYED_PIC_REF;
|
|
ret = finalize_frame(h, dst_frame, out, got_frame);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return buf_index;
|
|
}
|
|
|
|
static int h264_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
H264Context *h = avctx->priv_data;
|
|
AVFrame *pict = data;
|
|
int buf_index;
|
|
int ret;
|
|
|
|
h->flags = avctx->flags;
|
|
h->setup_finished = 0;
|
|
h->nb_slice_ctx_queued = 0;
|
|
|
|
ff_h264_unref_picture(h, &h->last_pic_for_ec);
|
|
|
|
/* end of stream, output what is still in the buffers */
|
|
if (buf_size == 0)
|
|
return send_next_delayed_frame(h, pict, got_frame, 0);
|
|
|
|
if (h->is_avc && av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
|
|
int side_size;
|
|
uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
|
|
if (is_extra(side, side_size))
|
|
ff_h264_decode_extradata(side, side_size,
|
|
&h->ps, &h->is_avc, &h->nal_length_size,
|
|
avctx->err_recognition, avctx);
|
|
}
|
|
if(h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC && (buf[5]&0x1F) && buf[8]==0x67){
|
|
if (is_extra(buf, buf_size))
|
|
return ff_h264_decode_extradata(buf, buf_size,
|
|
&h->ps, &h->is_avc, &h->nal_length_size,
|
|
avctx->err_recognition, avctx);
|
|
}
|
|
|
|
buf_index = decode_nal_units(h, buf, buf_size);
|
|
if (buf_index < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (!h->cur_pic_ptr && h->nal_unit_type == H264_NAL_END_SEQUENCE) {
|
|
av_assert0(buf_index <= buf_size);
|
|
return send_next_delayed_frame(h, pict, got_frame, buf_index);
|
|
}
|
|
|
|
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && (!h->cur_pic_ptr || !h->has_slice)) {
|
|
if (avctx->skip_frame >= AVDISCARD_NONREF ||
|
|
buf_size >= 4 && !memcmp("Q264", buf, 4))
|
|
return buf_size;
|
|
av_log(avctx, AV_LOG_ERROR, "no frame!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
|
|
(h->mb_y >= h->mb_height && h->mb_height)) {
|
|
if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
|
|
return ret;
|
|
|
|
/* Wait for second field. */
|
|
if (h->next_output_pic) {
|
|
ret = finalize_frame(h, pict, h->next_output_pic, got_frame);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
av_assert0(pict->buf[0] || !*got_frame);
|
|
|
|
ff_h264_unref_picture(h, &h->last_pic_for_ec);
|
|
|
|
return get_consumed_bytes(buf_index, buf_size);
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(H264Context, x)
|
|
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
|
|
static const AVOption h264_options[] = {
|
|
{ "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, 0 },
|
|
{ "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0 },
|
|
{ "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
|
|
{ "x264_build", "Assume this x264 version if no x264 version found in any SEI", OFFSET(x264_build), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VD },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass h264_class = {
|
|
.class_name = "H264 Decoder",
|
|
.item_name = av_default_item_name,
|
|
.option = h264_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_h264_decoder = {
|
|
.name = "h264",
|
|
.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_H264,
|
|
.priv_data_size = sizeof(H264Context),
|
|
.init = h264_decode_init,
|
|
.close = h264_decode_end,
|
|
.decode = h264_decode_frame,
|
|
.capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 |
|
|
AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
|
|
AV_CODEC_CAP_FRAME_THREADS,
|
|
.hw_configs = (const AVCodecHWConfigInternal*[]) {
|
|
#if CONFIG_H264_DXVA2_HWACCEL
|
|
HWACCEL_DXVA2(h264),
|
|
#endif
|
|
#if CONFIG_H264_D3D11VA_HWACCEL
|
|
HWACCEL_D3D11VA(h264),
|
|
#endif
|
|
#if CONFIG_H264_D3D11VA2_HWACCEL
|
|
HWACCEL_D3D11VA2(h264),
|
|
#endif
|
|
#if CONFIG_H264_NVDEC_HWACCEL
|
|
HWACCEL_NVDEC(h264),
|
|
#endif
|
|
#if CONFIG_H264_VAAPI_HWACCEL
|
|
HWACCEL_VAAPI(h264),
|
|
#endif
|
|
#if CONFIG_H264_VDPAU_HWACCEL
|
|
HWACCEL_VDPAU(h264),
|
|
#endif
|
|
#if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
|
|
HWACCEL_VIDEOTOOLBOX(h264),
|
|
#endif
|
|
NULL
|
|
},
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_EXPORTS_CROPPING,
|
|
.flush = flush_dpb,
|
|
.init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
|
|
.update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
|
|
.profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
|
|
.priv_class = &h264_class,
|
|
};
|